Roadbed structure capable of guaranteeing long-term performance of rock-filled roadbed and construction method of roadbed

Abstract

The invention relates to a roadbed structure capable of guaranteeing the long-term performance of a rock-filled roadbed and a construction method of the roadbed. The slope fixing layer is laid on the outer side of the side slope, a reinforcing mold is detachably installed on the side, away from the side slope, of the slope fixing layer, and concrete is poured into the reinforcing mold to form a reinforcing layer. The slope fixing layer is laid on the outer side of the slope, the slope can be effectively protected, in addition, the slope fixing stability of the slope fixing layer can be enhanced by forming the reinforcing layer through pouring of the reinforcing mold, the risk that the slope fixing layer falls off is reduced, and the problems that in the related technology, the embedding quality is difficult to guarantee during pre-slurrying rubble embedding, and the embedding quality is poor are solved. And the risk that passing vehicles are damaged due to falling is avoided.

Description

Technical Field

[0001] The present application relates to the fields of geotechnical engineering and highway engineering, and particularly relates to a subgrade structure for ensuring the long-term performance of a rock-filled subgrade and a construction method of the subgrade. Background Art

[0002] In the process of highway construction in China, there are currently many working conditions where quarry stones are used as subgrade filling materials. Such stone fillers usually have large particle sizes and uneven gradations. During the operation stage of the road, climatic actions such as rainfall and evaporation will change the moisture distribution inside the rock-filled subgrade. Fine particles in the rock-filled subgrade will inevitably be carried away during the flow of pore water, thereby causing a series of diseases such as uneven settlement of the rock-filled subgrade. In order to control the influence of climate change on the subgrade slope, currently, precast mortar rubble masonry is usually inlaid on the slope to form a skeleton on the slope to increase the surface roughness of the slope, reduce the erosion of the subgrade slope surface, and reduce rainfall infiltration. However, it is difficult to ensure the inlay quality of the precast mortar rubble masonry, and there is a risk of falling off and damaging passing vehicles. Summary of the Invention

[0003] The present application provides a subgrade structure for ensuring the long-term performance of a rock-filled subgrade and a construction method of a subgrade slope protection, which can solve the technical problem that it is difficult to ensure the inlay quality of precast mortar rubble masonry in the related art and there is a risk of falling off and damaging passing vehicles.

[0004] In a first aspect, an embodiment of the present application provides a subgrade structure for ensuring the long-term performance of a rock-filled subgrade, which includes: a subgrade having a slope; a slope stabilizing layer laid on the outer side of the slope, and a reinforcement mold is detachably installed on the side of the slope stabilizing layer away from the slope, and concrete is poured in the reinforcement mold to form a reinforcement layer.

[0005] In combination with the first aspect, in an implementation manner, the reinforcement mold includes: a plurality of longitudinal molds spaced apart along a direction perpendicular to the extension direction of the longitudinal molds; a plurality of transverse molds, and the plurality of transverse molds are all arranged in a staggered manner with the plurality of longitudinal molds; the longitudinal molds and the transverse molds both have a pouring cavity, and the pouring cavity of the longitudinal mold is communicated with the pouring cavity of the transverse mold.

[0006] In combination with the first aspect, in an implementation manner, the subgrade structure for ensuring the long-term performance of a rock-filled subgrade further includes: a waterproof layer sandwiched between the slope and the slope stabilizing layer.

[0007] In combination with the first aspect, in an implementation manner, the subgrade structure for ensuring the long-term performance of a rock-filled subgrade further includes a plurality of anchor members, each of the anchor members extends along a direction perpendicular to the slope surface of the slope, and each of the anchor members passes through the slope stabilizing layer, the waterproof layer and reaches the slope from the reinforcement layer in sequence.

[0008] In combination with the first aspect, in one embodiment, the subgrade structure for ensuring the long-term performance of the rock-filled subgrade further includes: a protective layer, the protective layer is connected to the slope, and the protective layer is sandwiched between the waterproof layer and the slope.

[0009] In combination with the first aspect, in one embodiment, the waterproof layer includes a geomembrane.

[0010] In combination with the first aspect, in one embodiment, the concrete includes foamed concrete.

[0011] In the second aspect, an embodiment of the present application provides a method for constructing a subgrade, which includes the above-mentioned subgrade structure for ensuring the long-term performance of the rock-filled subgrade. The construction method includes the following steps: laying a base material on the outside of the slope to form a slope stabilizing layer; installing a reinforcement mold at a preset position; pouring concrete into the reinforcement mold to form a reinforcement layer.

[0012] In combination with the second aspect, in one embodiment, before laying the base material on the outside of the slope to form a slope stabilizing layer, it includes: laying a waterproof layer on the outside of the slope.

[0013] In combination with the second aspect, in one embodiment, before installing the reinforcement mold at a preset position, it includes: pre-burying an anchor in the preset position, and making one end of the anchor extend into the slope and the other end penetrate through the slope stabilizing layer.

[0014] The beneficial effects brought by the technical solutions provided by the embodiments of the present application include:

[0015] By laying a slope stabilizing layer on the outside of the slope, the slope can be effectively protected. In addition, pouring a reinforcement layer using a reinforcement mold can also enhance the slope stabilizing stability of the slope stabilizing layer and reduce the risk of the slope stabilizing layer falling off, solving the technical problem that it is difficult to ensure the embedding quality of precast mortar rubble masonry in the related art and there is a risk of falling off and damaging passing vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a sectional view of the subgrade structure for ensuring the long-term performance of the rock-filled subgrade provided by the embodiment of the present application;

[0018] Figure 2 It is a partial structural schematic diagram of the reinforcement mold provided by the embodiment of the present application.

[0019] In the figure:

[0020] 1. Subgrade; 11. Slope.

[0021] 2. Slope stabilizing layer;

[0022] 3. Reinforcement mold; 31. Longitudinal mold; 32. Transverse mold;

[0023] 4. Reinforcement layer;

[0024] 5. Waterproof layer;

[0025] 6. Anchor. Specific implementation manners

[0026] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0027] The embodiment of the present application provides a subgrade structure for ensuring the long-term performance of a rock-filled subgrade, which can solve the technical problem in the related art that it is difficult to ensure the embedding quality of precast mortar rubble masonry, and there is a risk of falling off and damaging passing vehicles.

[0028] See Figure 1 As shown, it is a subgrade structure for ensuring the long-term performance of a rock-filled subgrade provided by the embodiment of the present application, which may include: a subgrade 1, the subgrade 1 having a slope 11. It should be understood that the subgrade 1 can use the rock materials from mountain excavation as the filling material for the subgrade 1; a slope stabilizing layer 2, the slope stabilizing layer 2 being laid on the outer side of the slope 11, and a reinforcement mold 3 being detachably installed on the side of the slope stabilizing layer 2 away from the slope 11. Concrete is poured in the reinforcement mold 3 to form a reinforcement layer 4. The slope stabilizing layer 2 can be formed by pouring clay.

[0029] The beneficial effects brought by the technical solution provided by the embodiment of the present application include: by laying the slope stabilizing layer 2 on the outer side of the slope 11, the slope 11 can be effectively protected. The slope stabilizing layer 2 can be formed by pouring clay. Clay itself has strong viscosity, and the particles adhere to each other, which can play a great role in the stability of the slope 11. In addition, pouring the reinforcement layer 4 by using the reinforcement mold 3 can further enhance the slope stabilizing stability of the slope stabilizing layer 2, reduce the risk of the slope stabilizing layer 2 falling off, and the use of the reinforcement mold 3 can also enable the reinforcement layer 4 to be built more quickly, saving construction time, and solving the technical problem in the related art that it is difficult to ensure the embedding quality of precast mortar rubble masonry and there is a risk of falling off and damaging passing vehicles.

[0030] See Figure 2 As shown, in some alternative embodiments, the reinforcement mold 3 may include: a plurality of longitudinal molds, and a plurality of the longitudinal molds 31 are arranged at intervals along a direction perpendicular to the extension direction of the longitudinal molds 31; a plurality of transverse molds 32, and a plurality of the transverse molds 32 are all arranged in an interleaved manner with the plurality of longitudinal molds 31; both the longitudinal molds 31 and the transverse molds 32 have pouring cavities, and the pouring cavity of the longitudinal mold 31 communicates with the pouring cavity of the transverse mold 32. It should be understood that the number of the longitudinal molds 31 and the transverse molds 32, and the distance between two adjacent longitudinal molds 31 or two adjacent transverse molds 32 can be prefabricated according to the actual situation of the slope 11. Each longitudinal mold 31 can be arranged to be parallel to each other, and each transverse mold 32 can also be arranged to be parallel to each other. The mutually interleaved transverse molds 32 and longitudinal molds 31 can be perpendicular to each other to form a net structure. In some other embodiments, the angle between the interleaved transverse molds 32 and longitudinal molds 31 can also be set to other angles other than perpendicular. The communication between the pouring cavity of the longitudinal mold 31 and the pouring cavity of the transverse mold 32 can enable the concrete to flow more evenly to each of the transverse molds 32 and longitudinal molds 31 when pouring concrete into the reinforcement mold 3, enhancing the stability of the finally formed reinforcement layer 4. In addition, during the pouring process, the concrete or other pouring materials will generate a large pressure on the mold. Through the design of the crisscross molds, this pressure can be resisted more effectively, preventing the reinforcement mold 3 from deforming.

[0031] In some alternative embodiments, the roadbed structure for ensuring the long-term performance of the rock-filled roadbed may further include: a waterproof layer 5, and the waterproof layer 5 is sandwiched between the slope 11 and the slope-fixing layer 2. In the embodiments of the present application, sandwiching the waterproof layer 5 between the slope 11 and the slope-fixing layer 2 can reduce or prevent water flow from flowing into the interior of the slope 11, effectively reducing the possibility of changing the moisture distribution inside the rock-filled roadbed 1 due to climate actions such as rainfall and evaporation. The waterproof layer 5 enhances the waterproof performance of the roadbed 1, thereby improving the overall stability of the roadbed 1. Under harsh climate conditions such as rainfall, the waterproof layer 5 can reduce the erosion and damage of the roadbed 1 by water, maintaining the integrity and bearing capacity of the roadbed 1. Moreover, by reducing the occurrence of roadbed 1 diseases, the waterproof layer 5 can also extend the service life of the roadbed 1 and reduce the maintenance cost.

[0032] In some alternative embodiments, the subgrade structure for ensuring the long-term performance of the rock-filled subgrade may further include a plurality of anchor members 6. Each anchor member 6 extends along a direction perpendicular to the slope surface of the slope 11, and each anchor member 6 sequentially passes through the slope stabilizing layer 2, the waterproof layer 5 to the slope 11 from the reinforcement layer 4. By penetrating deep into the interior of the slope 11, the anchor members 6 tightly connect the soil in the slope 11 with the reinforcement layer 4, the slope stabilizing layer 2 and the waterproof layer 5 to form an integral structure, which can significantly improve the anti-slip and anti-overturning capabilities of the slope 11, thereby enhancing the stability of the slope 11. In the embodiments of the present application, the anchor members 6 extending along a direction perpendicular to the slope surface of the slope 11 can enable construction workers to more conveniently carry out installation and debugging work, improving construction efficiency and quality; in some other embodiments, the anchor members 6 may also form other angles with the slope surface of the slope 11. Specifically, the anchor members 6 can be soil nails, expansion bolts, wedge anchors, etc.

[0033] In some alternative embodiments, the subgrade structure for ensuring the long-term performance of the rock-filled subgrade may further include: a protective layer, the protective layer is connected to the slope 11, and the protective layer is clamped between the waterproof layer 5 and the slope 11. In the embodiments of the present application, by providing the protective layer, a certain protection can be formed for the waterproof layer 5 to prevent the waterproof layer 5 from being scratched by the gravel in the rock-filled subgrade 1, ensuring the waterproof performance of the waterproof layer 5. The protective layer can be formed by pouring with foam light soil as the material, or other materials with protective performance can also be used.

[0034] In some alternative embodiments, the waterproof layer 5 includes a geomembrane. The geomembrane used can be one or more of HDPE geomembrane (high-density polyethylene geomembrane), LDPE geomembrane (low-density polyethylene geomembrane), LLDPE geomembrane (linear low-density polyethylene geomembrane), EVA geomembrane, PVC geomembrane, rough surface geomembrane or composite geomembrane. When the geomembrane is used, it can closely fit the surface of the slope 11 to form a continuous waterproof barrier, effectively preventing water from penetrating into the interior of the slope 11 and the subgrade 1, and significantly reducing the risk of subgrade 1 diseases caused by water penetration.

[0035] In some alternative embodiments, the concrete includes foam concrete. It should be understood that the foam concrete can be a mixture including a foaming agent and cement, etc. The slope 11 protection structure made of foam concrete has the characteristics of convenient and fast production and low cost, and can reduce the project cost and shorten the construction period. And because the foam concrete structure has high strength, light weight and good integrity, this subgrade 1 structure type has good durability and reliability.

[0036] The embodiments of the present application may further provide a construction method for a subgrade, which may include the above-mentioned subgrade structure for ensuring the long-term performance of the rock-filled subgrade. The construction method includes the following steps:

[0037] S1: Lay the base material on the outside of the slope 11 to form a slope stabilizing layer 2. In the embodiment of the present application, the base material may refer to clay, which has the characteristics of viscosity and small particles and can increase the stability of the slope 11. In some other embodiments, the base material may also be a mixture of sand and gravel, etc.

[0038] S2: Install the reinforcement mold 3 at a preset position; the reinforcement mold can be prefabricated according to the type of the slope 11.

[0039] S3: Pour concrete into the reinforcement mold 3 to form a reinforcement layer 4. The reinforcement mold 3 can be provided with a pouring hole at its top, that is, near the top surface of the roadbed 1. Pour foamed concrete through the pouring hole, and the reinforcement mold 3 can be removed after it solidifies.

[0040] In some alternative embodiments, before laying the base material on the outside of the slope 11 to form the slope stabilizing layer 2, it may include: laying a waterproof layer 5 on the outside of the slope 11. That is, the waterproof layer 5 is laid on the slope 11 and then the slope stabilizing layer 2 is laid. The slope stabilizing layer 2 itself has a certain waterproof property, and together with the waterproof layer 5, it can provide double waterproofing, making the roadbed structure have better waterproof performance.

[0041] In some alternative embodiments, before installing the reinforcement mold 3 at the preset position, it may include: embedding the anchor 6 at the preset position and making one end of the anchor 6 extend into the slope 11 and the other end penetrate through the slope stabilizing layer 2. In the embodiment of the present application, the reinforcement mold 3 may include a plurality of longitudinally arranged molds 31 and transversely arranged molds 32 that intersect with each other. When installing the anchor 6, the end that penetrates through the slope stabilizing layer 2 can be made to face the intersection of the longitudinally arranged mold 31 and the transversely arranged mold 32, thereby enhancing the overall stability of the roadbed structure. In addition, the reinforcement layer 4 formed by using the reinforcement mold 3 may include a plurality of longitudinal ribs and transverse ribs, which are arranged in a staggered manner on the side of the slope stabilizing layer 2 away from the slope 11. The formed support structure can reduce the length and intensity of runoff, and the formed mesh structure can also block the force of rainwater hitting downward, thereby reducing the erosion of the clay layer of the slope 11.

[0042] Preferably, after removing the reinforcement mold 3, grass seeds can also be sprayed on the surface of the slope stabilizing layer 2, and the overall structure of the roadbed 1 can be formed after the grass grows.

[0043] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] It should be noted that in the present application, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0045] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A roadbed structure for ensuring long-term performance of a rock-filled roadbed, characterized in that: It includes: A roadbed (1), wherein the roadbed (1) has a side slope (11); A slope consolidation layer (2), the slope consolidation layer (2) being laid on the outside of the side slope (11), and a reinforcement mold (3) being detachably installed on a side of the slope consolidation layer (2) away from the side slope (11), and concrete being poured in the reinforcement mold (3) to form a reinforcement layer (4).

2. The roadbed structure for ensuring long-term performance of rock-filled roadbed according to claim 1, characterized in that: The reinforcement mold (3) comprises: A plurality of longitudinal moulds, wherein the plurality of longitudinal moulds are arranged at intervals along an extension direction perpendicular to the longitudinal mould (31); A plurality of transverse molds (32), wherein the plurality of transverse molds (32) are arranged alternately with the plurality of longitudinal molds (31); The longitudinal mold (31) and the transverse mold (32) both have a casting cavity, and the casting cavity of the longitudinal mold (31) is connected to the casting cavity of the transverse mold (32).

3. The roadbed structure for ensuring long-term performance of rock-filled roadbed according to claim 1, characterized in that: The roadbed structure for ensuring the long-term performance of the rock-filled roadbed also includes: A waterproof layer (5), wherein the waterproof layer (5) is sandwiched between the side slope (11) and the slope consolidation layer (2).

4. The roadbed structure for ensuring long-term performance of a rock-filled roadbed as claimed in claim 3, characterized in that: The roadbed structure for ensuring the long-term performance of the rock-filled roadbed also includes a plurality of anchors (6), each of the anchors (6) extending in a direction perpendicular to the slope surface of the slope (11), and the anchors (6) pass through the slope consolidation layer (2), the waterproof layer (5) and the slope (11) in sequence from the reinforcement layer (4).

5. The roadbed structure for ensuring long-term performance of rock-filled roadbed according to claim 3, characterized in that: The roadbed structure for ensuring the long-term performance of the rock-filled roadbed also includes: A protective layer, the protective layer is connected to the side slope (11), and the protective layer is sandwiched between the waterproof layer (5) and the side slope (11).

6. The roadbed structure for ensuring long-term performance of rock-filled roadbed according to claim 3, characterized in that: The waterproof layer (5) is made of geomembrane.

7. The roadbed structure for ensuring long-term performance of a rock-filled roadbed as claimed in claim 1, characterized in that: The concrete is foamed concrete.

8. A method for constructing a roadbed, comprising the roadbed structure for ensuring long-term performance of a rock-filled roadbed as claimed in any one of claims 1 to 7, characterized in that: The construction method comprises the following steps: Laying a base material on the outer side of the slope (11) to form a slope consolidation layer (2); Installing the reinforcement mold (3) to a preset position; Concrete is poured into the reinforcement mold (3) to form a reinforcement layer (4).

9. The method for constructing a roadbed according to claim 8, characterized in that: Before laying the base material on the outside of the slope (11) to form the slope consolidation layer (2), the method includes: The waterproof layer (5) is laid on the outer side of the slope (11).

10. The method for constructing a roadbed according to claim 8, characterized in that: Before the reinforcement mold (3) is installed at the preset position, the method includes: The anchor (6) is pre-buried at a preset position, and one end of the anchor (6) extends into the slope (11) and the other end passes through the slope consolidation layer (2).

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